Allen County (Fort Wayne)
September
Weather in Allen County, Indiana for September 2026
Your guide to Allen County weather in September - trends and predictions
So far, September 2026 in Allen County is slightly warmer than the historical average by 1.4 °F.
The forecast for the next days in Allen County predicts a temperature of 22.4 °F, which is cooler than the historical average.
In general, the average temperature in Allen County at the beginning of September is 28 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.9 °F by the end of September.
The climate of Allen County in September is notably wet, with an average of 13 rainy days, and a total of 92.8 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
13
Rainy days
0
Snow days
26°/13°
Temperatures
17 km/h
Avg max wind
69 %
Avg humidity
Allen County Weather September
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Temperatures trend during September in Allen County
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September weather in Allen County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /13° | 0.9 mm | 6 | |
| Sept. 2 | Sunny | 30° /13° | 0 mm | 7 | |
| Sept. 3 | Sunny | 31° /16° | 0 mm | 7 | |
| Sept. 4 |  Partly cloudy | 30° /14° | 2.6 mm | 7 | |
| Sept. 5 |  Thundery outbreaks possible | 28° /15° | 0.3 mm | 6 | |
| Sept. 6 |  Light rain shower | 25° /14° | 3.3 mm | 6 | |
| Sept. 7 | Sunny | 23° /10° | 0.5 mm | 5 | |
| Sept. 8 |  Mist | 23° /8° | 0 mm | 5 | |
| Sept. 9 | Mist | 26° /12° | 0.2 mm | 5 | |
| Sept. 10 | Mist | 27° /13° | 0.6 mm | 5 | |
| Sept. 11 | Mist | 28° /13° | 0.1 mm | 7 | |
| Sept. 12 | Fog | 27° /13° | 2.7 mm | 5 | |
| Sept. 13 |  Overcast | 26° /13° | 7.7 mm | 6 | |
| Sept. 14 | Mist | 27° /11° | 0 mm | 7 | |
| Sept. 15 | Overcast | 29° /13° | 0 mm | 6 | |
| Sept. 16 | Patchy rain possible | 25° /20° | 3.5 mm | 5.6 | |
| Sept. 17 | Light rain shower | 28° /19° | 7 mm | 5.6 | |
| Sept. 18 | Overcast | 23° /16° | 0 mm | 6.1 | |
| Sept. 19 | Light rain shower | 22° /16° | 15.8 mm | 4.5 | |
| Sept. 20 | Light rain shower | 21° /16° | 23 mm | 4 | |
| Sept. 21 | Light rain shower | 26° /16° | 9.2 mm | 6 | |
| Sept. 22 | Sunny | 24° /18° | 4.9 mm | 6 | |
| Sept. 23 | Sunny | 25° /17° | 0 mm | 6 | |
| Sept. 24 | Overcast | 26° /19° | 6.3 mm | 6 | |
| Sept. 25 | Fog | 19° /17° | 8.3 mm | 4 | |
| Sept. 26 | Sunny | 20° /14° | 16 mm | 6 | |
| Sept. 27 | Sunny | 16° /11° | 0.3 mm | 5 | |
| Sept. 28 | Sunny | 16° /8° | 0 mm | 5 | |
| Sept. 29 | Patchy rain possible | 24° /14° | 12.2 mm | 5 | |
| Sept. 30 | Mist | 25° /14° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Allen County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Allen County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Allen County in September - FAQ
What are the expected maximum and minimum temperatures in Allen County during September?
Enjoy moderate daytime temperatures of up to 26° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Allen County during September?
Moderate rainfall is anticipated in Allen County during September, with a total of 92.8 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Allen County during September?
The average wind speed in Allen County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Allen County
Explore the daily rainfall trends and prepare for Allen Countys September weather 💧
Typically, Allen County has 13 rainy days in September with a total of 92.8 mm of rainfall.
UV exposure in Allen County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Allen County?Get accurate weather forecasts for Allen County, located at latitude 41.131 and longitude -85.129. Stay updated with localized weather information tailored for Allen County.
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